First... I'm a Lutheran.. The good moderator of this forum said it's ok - as long as I behave myself I'll do my best, but feel free to whack me if I get out of line.
I started off as a one-man IT shop in 2000 - I served small business until my first child was born in 2005 and I had to turn it into a real business and we now serve about 30 businesses around the Pacific Northwest.
Running a business is highly overrated and I was not prepared to manage employees - but over the years I've learned those skills by trial and error.
The economy has been hard on us, but we're seeing more spending among our customers.
What we're good at:
Professional and prompt emergency support
Using humble and cost effective technology.
What we're bad at:
As for faith interacting with business, I've found much good in Saint Josemaria Escriva's writings - that doing things properly and professionally is what God would have us do is quite powerful and humbling.
I'd have responded sooner, but I had no idea we got our own message board! Time to make this place happening.
If you haven't dealt with this yet, I think your method works well. A quiet chat with your manager expressing your concerns wouldn't hurt, and mention that it is only those kinds of clients you would have a problem with.
There might be some political issues involved if your manager is not understanding, or others might use it as leverage. You already know this probably, and are aware of the consequences. On the flip side, some people do value integrity, so this might have zero impact at all.
if it's going to come up though, it's better to get all the cards on the table rather than them be caught be surprise.